Comment on the legend told by the Cardinal de Polignac that St. Denis, carrying his head in his hands, walked two leagues. Letter to Jean Le Rond d'Alembert (1763-07-07). Voltaire wrote to Madame du Deffand (January 1764) that one of her bon-mots was quoted in the notes of La Pucelle, canto 1: "Il n'y a que le premier pas qui coûte.".